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Hydrogen was the first matter to be formed after the Big Bang.
The highly energetic state of the Universe for some time after the Big Bang prevented atomic constituent particles to form independent atoms.
As the Universe expanded and cooled it became possible for the simplest atomic structures to form.
This happens to be Hydrogen.
A hydrogen atom consist of a central positively charged proton around which iselectrically bounda negatively charged electron.
Two further forms, or isotopes, of the hydrogen atom were also created. Deuterium contains an electrically neutral neutron at its central nucleus along with the proton. Tritium contains two neutrons at the nucleus. These isotopes represent a tiny fraction of the total amount of hydrogen that exists in the Universe.
What else can I help you with?
When astronomers say that the universe became transparent years after the big bang what do they mean?
In the early period after the Big Bang, the universe consisted of a plasma of nuclei, electrons and photons. These protons were bound in the plasma and not free to move about. About 0.4 million years after the Big Bang, when the universe had cooled to around 4000 K, photons stopped being in thermal equilibrium with matter: the universe became transparent to photons - light could move about.
What in astronomy is a thousand million years?
A thousand million years is equivalent to one billion years. In astronomy, this timescale is often used to refer to the age of objects in the universe, such as stars and galaxies. The concept of a billion years helps astronomers understand the long-term evolution and history of celestial bodies.
What states that all matter and energy in the universe exploded ten to twenty billion years ago and began expanding in all directions.?
The theory that describes the origin of the universe as an explosion of all matter and energy is known as the Big Bang Theory. According to this theory, the universe began as a singularity and has been expanding ever since, roughly 13.8 billion years ago. This expansion continues today, leading to the vast and dynamic universe we observe.
About many years ago do scientists think the universe first started to form?
Scientists estimate that the universe began forming around 13.8 billion years ago during an event known as the Big Bang. This marks the beginning of the expansion of space and the creation of all matter and energy in the universe.
If flying at light speed for an Eon is it possible to go beyond the universe?
The universe is about 90 billion light years across. An eon is about 550 million years. Flying at the speed of light for 550 million years you would travel 550 million light years, less than 1% of the distance across the known universe. So, probably not. It would make no difference how long you travel at light speed. If you travel for a billion trillion eons, you would still not pass through the boundries of the universe. For one thing, you would have a serious problem timing your journey, since for you a trip of any length would seem instantaneous.
After the first few hundred million years after the Big Bang pulled matter together to form the first structures in the universe.?
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How you can know some parts of the universe look a million years ago?
some of the stars we see in the universe took millions of years to get here - we are seeing what it looked like a million years ago.
Does the universe look empty a million light years away?
No it doesn't!
How old is the star capella?
Capella is estimated to be around 500 million to 700 million years old, which is relatively young compared to other stars in the universe.
How much mass is needed to stop the universe from expanding by 5 to 10 percent every million years if dark and visible matter are considered?
I am not entirely sure what you mean with "stop the Universe from expanding 5-10% every million years"; it certainly doesn't expand that quickly. It takes several billion years to double in size.Note that under just about any conditions, the Universe would eventually contract, or expand. It can't just remain static.
Why do scientists believe all the matter in the universe was originally in one place?
Because we currently can see that the universe is expanding and if you logically reverse this process of expansion and extrapolate back, our best measurements to date puts all the matter, energy, space and time back to a single point some 13.772 billion years ago, with an uncertainty of plus or minus 59 million years.
When is the end of the universe?
basically whenever the sun dies, but that will not happen for a few million years
What is the diameter of the Universe today?
The radius of the observable Universe is thought to be about 46x10^9 Light Years.(And dark matter about which we know almost nothing, occupies perhaps 90% of it).Our Milky Way Galaxy is about 100 000 Light Years across, and out nearest neighbour, the Andromeda Galaxy is about 2.5 million light years distant.Answer2: My estimate of the diameter is about 320E24 meters.
What has existed for at least 3 million years?
The universe has existed for more than 14 billion years, the sun for more than 4 billion years - both well over 3 million years.
Scientists think that a few hundred million years or so after the Big Ban space cooled off enough for matter to form This matter spread out around the universe with no structure but each little bit?
Yes, after the Big Bang, the universe rapidly expanded and cooled down, allowing particles to come together and form matter. This matter eventually spread out unevenly, clumping together due to gravity to form structures like galaxies and stars.
How old are the universe?
Agreement seems to been reached at 13.7 billion years give or take 100 million. would you be aquiring an E after the s in universe?
Why cant you directly observed any era prior to the era of atoms?
Because up until then (universe about a third of a million years old) the universe was opaque.
